Guideline for specific captcha type

I have noticed a lot of honest error typing for kind of very simple and clean captchas but it surprised me because I can remember, I have concerned with the same captchas few months earlier. Here are some captchas and explained how to determine the captchas content.

Four common rules and example below:

1.       The primary fact, the primary rule is those captcha is 6 (six) characters. This rules is static. All similar captcha will have 6 characters only.

2.       There a line in background, if this background line cross 7 it make a false Z and if the line cross O it make a false Q So follow the line closely and be aware about it.

3.       W and v are over confusing. Sometime double v (vv) make look W and W make double v (VV). So you need close attention, also the number of character can help to determine its vv or w.

4.       O is larger than 0 (zero).

 

Captcha

Wrong

Correct

lnxvoh

lnxv0h

·         This is 0 (zero), and O is wrong.  Zero is bigger than o.

svvs6gm

sws6gm

·         This is w, not double v, double v means it will 7 characters, which supposed to  6 characters.

8gimo

8gimXo

·         5 character is wrong, need to understand it have a x beside m and o.

8keyw

8keyvv

·         It cannot 5 characters, as I said, it is 6.

h2wrop

h2wr0p

·         Its 0 zero, zero height is higher than o.

I7B7O

I7B7QJ

·         There are j beside o (not zero), its low visible but assumed easily as it should 6 characters.

mn65qu

MN65OU

·         I Told about the line in the common rules, here this line make o to look like a q, a false q (Q)

mvmnrw

nvvnrw

·         There are no M, look at it, its double vv.

 

Thanks everyone.